Add .queue() to embed action in CommandSyncNitro for proper execution

src/main/java/com/alttd/commandManager/commands/CommandSyncNitro.java

@@ -82,7 +82,7 @@ public class CommandSyncNitro extends DiscordCommand {
         }
 
         replyCallbackAction.setEmbeds(Util.genericSuccessEmbed("Success", "Syncing " + userIdList.size() + " users in background"))
-                .queue();
+                .queue(RestAction.getDefaultSuccess(), Util::handleFailure);
 
         scheduler.shutdown();
     }